病变的英文是 "lesion"，它的来源是拉丁语 "laesio"，意思是 "伤害" 或 "损坏"。下面是一些英文例句：

The patient has a lesion on his skin.

The MRI showed a lesion in the patient's brain.

The doctor will biopsy the lesion to determine if it is cancerous.